How to shoot great sports photography on your iPhone

You may not have a telephoto lens, but you can still take great sports photography with your iPhone* it's all about knowing the right tricks.
In addition to skating with Boston, I coach a couple of roller derby teams. One of the most important tools for me, as a coach, has become my iPhone: Taking video of practices and drills; breaking down skater stance in photographs; making notes for future strategy adjustments.
As a result, I've spent a lot of time using my iPhone as a sports camera, and I'm repeatedly surprised at just how well it does. Here are some of the tips I use to make sure I get good photos and videos of practices and games; whether you're shooting roller skating or another sport, hopefully they can help you out, too.